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Two-stage identification of structural damage based on incomplete static data
Received date: 2016-09-25
Online published: 2018-10-26
In structural damage identification, traditional methods often result in wrong damage locations and large error in the degree of damages due to limited measurements and too many parameters. Applications of these methods are limited for complex structures. A two-stage identification method for structural damage based on incomplete static data is presented in this paper. The method combines damage localization index based on static strain energy and damage degree computation based on a finite element condensation technique. Possible damage locations of the structure are located with the damage localization index. The degrees of damage are determined by solving the damage state equation with a simulated annealing algorithm. To verify availability and reliability of the proposed method, damaged identifications of a 5 element statically indeterminate, a 13 element statically determinate, and a 10 element statically indeterminate planar trusses are simulated numerically. The results show that the proposed method can effectively identify locations of structural damage and the degrees of the damage. It is robust against measurement noise.
YANG Wanfeng, YANG Xiao . Two-stage identification of structural damage based on incomplete static data[J]. Journal of Shanghai University, 2018 , 24(5) : 841 -852 . DOI: 10.12066/j.issn.1007-2861.1844
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